Annotation of src/usr.bin/tmux/cmd-load-buffer.c, Revision 1.17
1.17 ! nicm 1: /* $OpenBSD: cmd-load-buffer.c,v 1.16 2011/01/04 00:42:46 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
1.12 nicm 19: #include <sys/types.h>
20:
1.1 nicm 21: #include <errno.h>
1.11 nicm 22: #include <stdio.h>
1.1 nicm 23: #include <stdlib.h>
24: #include <string.h>
1.12 nicm 25: #include <unistd.h>
1.1 nicm 26:
27: #include "tmux.h"
28:
29: /*
30: * Loads a session paste buffer from a file.
31: */
32:
33: int cmd_load_buffer_exec(struct cmd *, struct cmd_ctx *);
1.13 nicm 34: void cmd_load_buffer_callback(struct client *, void *);
1.1 nicm 35:
36: const struct cmd_entry cmd_load_buffer_entry = {
37: "load-buffer", "loadb",
1.16 nicm 38: "b:", 1, 1,
1.15 nicm 39: CMD_BUFFER_USAGE " path",
1.16 nicm 40: 0,
41: NULL,
42: NULL,
43: cmd_load_buffer_exec
1.1 nicm 44: };
45:
46: int
47: cmd_load_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
48: {
1.16 nicm 49: struct args *args = self->args;
50: struct client *c = ctx->cmdclient;
51: FILE *f;
52: const char *path;
53: char *pdata, *new_pdata, *cause;
54: size_t psize;
55: u_int limit;
56: int ch, buffer;
57: int *buffer_ptr;
58:
59: if (!args_has(args, 'b'))
60: buffer = -1;
61: else {
62: buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
63: if (cause != NULL) {
64: ctx->error(ctx, "buffer %s", cause);
65: xfree(cause);
66: return (-1);
67: }
68: }
1.1 nicm 69:
1.16 nicm 70: path = args->argv[0];
71: if (strcmp(path, "-") == 0) {
1.13 nicm 72: if (c == NULL) {
1.16 nicm 73: ctx->error(ctx, "%s: can't read from stdin", path);
1.12 nicm 74: return (-1);
75: }
1.13 nicm 76: if (c->flags & CLIENT_TERMINAL) {
1.16 nicm 77: ctx->error(ctx, "%s: stdin is a tty", path);
1.12 nicm 78: return (-1);
79: }
1.13 nicm 80: if (c->stdin_fd == -1) {
1.16 nicm 81: ctx->error(ctx, "%s: can't read from stdin", path);
1.12 nicm 82: return (-1);
83: }
1.13 nicm 84:
1.16 nicm 85: buffer_ptr = xmalloc(sizeof *buffer_ptr);
86: *buffer_ptr = buffer;
87:
88: c->stdin_data = buffer_ptr;
1.13 nicm 89: c->stdin_callback = cmd_load_buffer_callback;
90:
91: c->references++;
92: bufferevent_enable(c->stdin_event, EV_READ);
93: return (1);
94: }
95:
1.16 nicm 96: if ((f = fopen(path, "rb")) == NULL) {
97: ctx->error(ctx, "%s: %s", path, strerror(errno));
1.13 nicm 98: return (-1);
1.1 nicm 99: }
100:
1.11 nicm 101: pdata = NULL;
102: psize = 0;
103: while ((ch = getc(f)) != EOF) {
104: /* Do not let the server die due to memory exhaustion. */
105: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
106: ctx->error(ctx, "realloc error: %s", strerror(errno));
107: goto error;
108: }
109: pdata = new_pdata;
110: pdata[psize++] = ch;
1.1 nicm 111: }
1.11 nicm 112: if (ferror(f)) {
1.16 nicm 113: ctx->error(ctx, "%s: read error", path);
1.9 nicm 114: goto error;
1.1 nicm 115: }
1.11 nicm 116: if (pdata != NULL)
117: pdata[psize] = '\0';
1.1 nicm 118:
1.13 nicm 119: fclose(f);
1.1 nicm 120:
1.15 nicm 121: limit = options_get_number(&global_options, "buffer-limit");
1.16 nicm 122: if (buffer == -1) {
1.15 nicm 123: paste_add(&global_buffers, pdata, psize, limit);
1.1 nicm 124: return (0);
125: }
1.16 nicm 126: if (paste_replace(&global_buffers, buffer, pdata, psize) != 0) {
127: ctx->error(ctx, "no buffer %d", buffer);
1.13 nicm 128: return (-1);
1.1 nicm 129: }
130:
131: return (0);
1.9 nicm 132:
133: error:
134: if (pdata != NULL)
135: xfree(pdata);
1.13 nicm 136: if (f != NULL)
137: fclose(f);
1.9 nicm 138: return (-1);
1.13 nicm 139: }
140:
141: void
142: cmd_load_buffer_callback(struct client *c, void *data)
143: {
1.16 nicm 144: int *buffer = data;
1.15 nicm 145: char *pdata;
146: size_t psize;
147: u_int limit;
1.13 nicm 148:
149: /*
150: * Event callback has already checked client is not dead and reduced
151: * its reference count. But tell it to exit.
152: */
153: c->flags |= CLIENT_EXIT;
154:
155: psize = EVBUFFER_LENGTH(c->stdin_event->input);
1.16 nicm 156: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL) {
1.17 ! nicm 157: xfree(data);
1.15 nicm 158: return;
1.16 nicm 159: }
1.13 nicm 160: bufferevent_read(c->stdin_event, pdata, psize);
161: pdata[psize] = '\0';
162:
1.15 nicm 163: limit = options_get_number(&global_options, "buffer-limit");
164: if (*buffer == -1)
165: paste_add(&global_buffers, pdata, psize, limit);
166: else if (paste_replace(&global_buffers, *buffer, pdata, psize) != 0) {
1.13 nicm 167: /* No context so can't use server_client_msg_error. */
168: evbuffer_add_printf(
1.15 nicm 169: c->stderr_event->output, "no buffer %d\n", *buffer);
1.13 nicm 170: bufferevent_enable(c->stderr_event, EV_WRITE);
171: }
1.16 nicm 172:
1.17 ! nicm 173: xfree(data);
1.1 nicm 174: }
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